In Super Smash Bros. for Nintendo 3DS / Wii U, this move has two custom variants:

Blade Coaster enables Meta Knight to travel forward instead of up, enabling him to cover more distance horizontally, but it offers less vertical distance, and takes a bit longer to start up. Opponents who are hit by this attack are sent flying at a lower angle.

Lazy Shuttle Loop has Meta Knight performing a slower loop before striking with a single attack. It offers more vertical distance than Shuttle Loop. However, it also removes the initial hit that Meta Knight performs before starting the attack, which makes it less effective at making KOs.